Find your domain registrar or DNS hosting provider

To set up a domain to Office 365, you, as an admin, must own a domain and change some of the DNS records for your domain. If you don’t already own a domain, you can buy one from a domain name registrar.

Your domain name registrar usually, but not always, manages the DNS records for your domain. If you don’t remember the domain name registrar where you registered your domain, follow the steps here to find the registrar. If your registrar doesn’t manage your DNS records, you’ll have to find your DNS hosting provider.